Strap for Master Collection 42 Date Stainless Steel / Pink Gold / White-Roman / Bracelet

The lug width is 21mm. This dimension represents the space between the two case lugs and is essential for ordering a compatible strap. To measure it correctly, use a digital calliper positioning it from the inside of one lug to the inside of the other, without pressure. Any 21mm strap will be compatible with this model.

Alligator with vegetable tanning is the most noble choice, as the structured grain mirrors the elegance of the two-tone case. For greater practicality and durability, box calf in dark brown is ideal. If you seek maximum compactness and patina over time, burgundy shell cordovan particularly enhances the rose gold. For informal use or humid environments, pressed rubber remains the most functional solution.

Strap replacement requires lug pin removal using a specific spring bar tool. Position the watch on a soft cloth with the dial facing up. Insert the spring bar tool into the smaller hole of the lug from the side without the lug lock, applying light but constant pressure until the pin emerges. Repeat for both lugs. Finally, align the new strap lugs with the case holes and insert the pins from the same side. If unsure, contact Casati Milano for professional service.

Replacing the strap with a compatible aftermarket model does not void the official Longines warranty on the case and movement, since the strap is a detachable component. However, for absolute legal certainty, consult your watch's warranty documentation. Compatible 21mm straps purchased from certified retailers guarantee precise fit with no risk to the lugs.

An alligator or vegetable-tanned calf strap, with proper care (regular cleaning and natural conditioner), lasts between 3 and 5 years. Shell cordovan, being denser, can reach 7 years. Lifespan depends on usage: leather regularly exposed to water ages more rapidly. Casati Milano guarantees 18 months on bespoke straps, a period covering initial adjustment. The patina that develops is a sign of quality, not deterioration.